Einecs 287-118-8

4-hydroxy-3-[(4-nitrophenyl)azo]-5-[[(p-tolyl)sulphonyl]amino]naphthalene-2,7-disulphonic acid

4-Hydroxy-5-[[(4-methylphenyl)sulfonyl]amino]-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid